CN218160202U - Circuit breaker - Google Patents

Abstract

The embodiment of the application provides a circuit breaker, the circuit breaker comprises a shell, a rotating mechanism, an operating mechanism, a locking mechanism and a tripping assembly, wherein the shell comprises a first part, a second part and a third part which are sequentially arranged in a first direction, the interiors of the first part, the second part and the third part are communicated with each other, and the height of the second part in the second direction is smaller than that of the first part and the third part in the second direction, so that the first part, the second part and the third part are surrounded by the shell to form a containing space; the operating space is arranged in the accommodating space, the rotating mechanism and the tripping assembly are arranged in the accommodating space, and the tripping assembly is configured to drive the locking mechanism to move when the current in the circuit breaker is abnormal so as to drive the moving contact to be far away from the static contact. The breaker provided by the embodiment of the application can improve the breaking capacity and the arc extinguishing effect of the breaker under a high-voltage level.

Description

Circuit breaker

Technical Field

The application belongs to the technical field of electrical equipment, especially relates to a circuit breaker.

Background

As the market continues to develop, there are more and more occasions requiring high voltage class molded case circuit breakers, such as AC1150V, DC1500V, etc. Most manufacturers in the industry derive products directly from existing mature molded case circuit breakers, but the products cannot be well applied to the occasions because the products have more or less quality problems, such as: the insulating ability is not enough, breaking capacity is low (in the existing structure form, the arc extinguishing chambers with enough capacity cannot be arranged), even under the condition of high voltage level, the basic isolation performance is reduced, and the arc extinguishing effect is correspondingly reduced greatly.

Disclosure of Invention

The application provides a circuit breaker can improve circuit breaker breaking capacity and arc extinguishing effect under the high voltage level.

An embodiment of a first aspect of the present application provides a circuit breaker, which includes a housing, a rotating mechanism, an operating mechanism, a locking mechanism, and a trip assembly, where the housing includes a first portion, a second portion, and a third portion that are sequentially arranged in a first direction, the interiors of the first portion, the second portion, and the third portion are communicated with each other, and a height of the second portion in the second direction is smaller than a height of the first portion and the third portion in the second direction, so that the first portion, the second portion, and the third portion are semi-enclosed outside the housing to form an accommodating space, and the first direction intersects with the second direction; the rotating mechanism is rotatably connected in the first part; the operating mechanism is arranged in the accommodating space and connected to the rotating mechanism for driving the moving contact connected with the rotating mechanism to be far away from or close to the fixed contact; the locking mechanism is arranged in the accommodating space and drives the moving contact to move through the operating mechanism; the tripping assembly is arranged in the third portion and is configured to drive the locking mechanism to move when current in the circuit breaker is abnormal so as to drive the moving contact to be far away from the static contact.

In some embodiments, the third portion includes a sidewall between the trip unit and the operating mechanism, and a through hole extending through the sidewall in the first direction, through which the portion of the trip unit can enter the receiving space and move the locking mechanism.

In some embodiments, the trip assembly includes a driving member and a pushing member, the driving member is used for driving the pushing member to move, so that at least part of the pushing member enters the accommodating space.

In some embodiments, the pushing member includes a conductive portion and a pushing portion connected to each other, and the driving member moves the pushing portion through the conductive portion.

In some embodiments, the conductive portion includes a first section sandwiched between the pushing portion and the driving member, and a second section located at a side of the pushing portion in the second direction, the second section being slidably connected to the through hole; wherein the orthographic projection of the second subsection on the side wall is overlapped with the through hole.

In some embodiments, the orthographic projection of the first section at the sidewall is at least partially outside the through hole.

In some embodiments, the circuit breaker further includes an arc extinguishing system disposed along the second direction on a side of the movable contact away from the rotating mechanism.

In some embodiments, the arc quenching system is located within the first portion and the second portion.

In some embodiments, the circuit breaker further includes a gas channel disposed within the second portion and the third portion, the trip assembly being in communication with the arc extinguishing system through the gas channel, the gas in the gas channel being capable of driving the trip assembly to move so as to move the moving contact away from the stationary contact.

In some embodiments, in the second direction, the trip assembly and the outlet of the gas channel are located on a side of the arc extinguishing system facing the rotating mechanism.

In some embodiments, the circuit breaker further comprises a plurality of deionization units spaced apart within the gas passage.

In some embodiments, the third portion includes a receiving portion communicating with the outside, a connection terminal is provided in the receiving portion, and the outlet of the gas passage communicates with the receiving portion.

In some embodiments, the circuit breaker further comprises a limiting member disposed on a movement path of the locking mechanism to limit a moving distance of the locking mechanism.

In the circuit breaker provided by the embodiment of the application, the circuit breaker comprises a shell, a rotating mechanism, an operating mechanism, a locking mechanism, a tripping assembly and the like, wherein the locking mechanism and the operating mechanism are arranged in an accommodating space, the accommodating space is positioned outside the shell, and the locking mechanism is connected with the operating mechanism; the rest of the mechanism is positioned in the shell. When the circuit breaker needs to be tripped and opened when the current is abnormal, the tripping component drives the locking mechanism to move so as to unlock, so that the moving contact is separated from the static contact to complete opening. The utility model provides a tripping device sets up in the third part of casing, and locking mechanical system sets up and is located outside the casing and be connected with tripping device in accommodation space, sets up the circuit breaker like this and need not to open the casing again and directly contact tripping device with locking mechanical system when needs separating brake, can keep the gas tightness in the casing to can promote the arc extinguishing effect and the breaking capacity of circuit breaker.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, which proceeds with reference to the accompanying drawings, in which like or similar reference characters refer to the same or similar parts.

Fig. 1 is a schematic structural diagram of a housing according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a circuit breaker according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an operating mechanism and a locking mechanism provided by an embodiment of the present application;

fig. 4 is a schematic perspective view of a housing provided in an embodiment of the present application;

FIG. 5 is an enlarged schematic view of portion A of FIG. 4;

fig. 6 is a schematic structural diagram of a trip assembly provided in an embodiment of the present application;

FIG. 7 is a schematic structural view of a pusher member provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.

Description of reference numerals:

100. a circuit breaker; x, a first direction; y, a second direction;

1. a housing; 11. a first portion; 12. a second portion; 13. a third portion; 131. a side wall; 132. a through hole; 14. an accommodating space; 15. a moving contact; 16. static contact; 17. an accommodating portion; 171. a wiring terminal;

2. a rotating mechanism; 21. a rotating wheel;

3. an operating mechanism; 31. an upper connecting rod; 32. a primary elastic member; 33. a lower connecting rod; 34. an operating handle; 35. an operation frame;

4. a locking mechanism; 41. a first locking member; 42. a second locking member; 43. a third locking member; 44. a fourth locking member; 45. a limiting member;

5. a trip assembly; 51. a drive member; 511. a double-metal adjusting nut; 512. a bimetal; 513. a moving iron sheet; 514. a static iron sheet; 52. a pusher member; 521. a conduction part; 521a, a first subsection; 521b, a second section; 522. a pushing part;

6. an arc extinguishing system; 61. an arc extinguishing chamber;

7. a gas channel; 71. and a deionization device.

Detailed Description

Features of various aspects of the present application and exemplary embodiments will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

At present, among the prior art, in common single-break moulded case circuit breaker's the structure, operating device, locking mechanism, slewing mechanism and arc extinguishing system all set up in same cavity, when circuit fault need dropout separating brake, need open the casing and let the release direct with the hasp contact, gas tightness in the casing has seriously been influenced like this, consequently when the gaseous demand of electric arc is released, the electric arc particle can penetrate the gap of casing, the electric arc particle can burn operating device or pivot on operating device and slewing mechanism attached to, even under big short-circuit current's the condition, it is more serious to burn the phenomenon, in what more, the electric arc particle probably gets into the thermomagnetic release, lead to the circuit breaker to lose essential deciliter ability.

In order to solve the above problem, embodiments of the present invention provide a circuit breaker 100, and embodiments of the circuit breaker 100 will be described below with reference to the accompanying drawings.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a housing according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a circuit breaker according to an embodiment of the present disclosure; fig. 3 is a schematic structural diagram of an operating mechanism and a locking mechanism provided in an embodiment of the present application.

As shown in fig. 1 to 3, a circuit breaker 100 according to an embodiment of the first aspect of the present application includes a housing 1, a rotating mechanism 2, an operating mechanism 3, a locking mechanism 4, and a trip assembly 5, where the housing 1 includes a first portion 11, a second portion 12, and a third portion 13 sequentially arranged in a first direction X, the interiors of the first portion 11, the second portion 12, and the third portion 13 are communicated with each other, a height of the second portion 12 in a second direction Y is smaller than a height of the first portion 11 and the third portion 13 in the second direction Y, so that the first portion 11, the second portion 12, and the third portion 13 are semi-enclosed outside the housing 1 to form an accommodating space 14, and the first direction X intersects with the second direction Y; the rotating mechanism 2 is rotatably connected in the first part 11; the operating mechanism 3 is arranged in the accommodating space 14 and connected to the rotating mechanism 2, and is used for driving the movable contact 15 connected with the rotating mechanism 2 to move away from or close to the fixed contact 16; the locking mechanism 4 is arranged in the accommodating space 14, and the movable contact 15 is driven by the locking mechanism 4 through the operating mechanism 3 to move; a trip assembly 5 is disposed in the third portion 13, and the trip assembly 5 is configured to drive the locking mechanism 4 to move when the current in the circuit breaker 100 is abnormal, so as to drive the movable contact 15 away from the fixed contact 16.

In this embodiment of the present application, an included angle formed by intersecting the first direction X and the second direction Y is not limited in this application, as long as the two directions do not overlap or are parallel to each other, and the following description will be given by taking the first direction X as a horizontal direction and the second direction Y as a vertical direction as an example, optionally, the housing 1 includes a top and a bottom which are opposite to each other, wherein the accommodating space 14 is an external space formed by a portion of the housing 1 recessed toward the bottom, the operating mechanism 3 and the locking mechanism 4 are both disposed in the accommodating space 14, the trip assembly 5 is located at the top of the third portion 13, the rotating mechanism 2 is also located at the top of the first portion 11, and the trip assembly 5, the locking mechanism 4, the operating mechanism 3 and the rotating mechanism 2 are sequentially disposed along the first direction X and located at the same height, so that when the breaker 100 needs to be disconnected, a rapid chain reaction can occur to achieve a purpose that the breaker 100 is rapidly disconnected under a current abnormal condition, and a breaking capability of the breaker 100 is improved.

The housing 1 may be disposed in various ways, for example, the housing 1 may be recessed downward along the second direction Y to form an accommodating space 14, and the accommodating space 14 is separated from the entire inner space of the housing 1, so as to reduce the risk of the arc particles adhering to the operating mechanism 3 and the locking mechanism 4, and ensure the breaking effect of the circuit breaker 100. Meanwhile, the whole shell 1 is of a concave structure, a plurality of hollow cavities are formed in the shell 1 and are communicated with one another, so that the airtightness inside the shell 1 can be guaranteed, the trend of internal airflow can be better guided, and the arc extinguishing effect of the circuit breaker 100 can be improved.

Optionally, in this embodiment of the present application, the rotating mechanism 2 includes a rotating wheel 21, the rotating wheel 21 is rotatably connected to the housing 1, wherein the movable contact 15 is located on the rotating wheel 21 and can move synchronously with the rotating wheel 21, the movable contact 15 and the stationary contact 16 are used in cooperation, and when the movable contact 15 and the stationary contact 16 are combined, the circuit breaker 100 is in a connected state, that is, a closed state; when the movable contact 15 is separated from the fixed contact 16, the circuit breaker 100 is in an open circuit state, i.e., an open state.

As shown in fig. 3, the operating mechanism 3 may be arranged in a variety of ways, and optionally, in the embodiment of the present application, a four-bar mechanism is taken as an example for illustration, and the operating mechanism 3 is detachably connected to the housing 1, so as to facilitate subsequent maintenance and replacement, where the operating mechanism 3 includes an upper bar 31, a lower bar 33 and a main elastic member 32, the upper bar 31 and the lower bar 33 are rotatably connected through a rotating shaft (not shown in the figure), one end of the main elastic member 32 is connected to the rotating shaft, and the other end is connected to the operating handle 34 through an operating frame 35, one end of the main elastic member 32 connected to the operating handle 34 is used for receiving an external force, and the other end is used for applying a pulling force to the rotating shaft and driving the rotating shaft to move, and the rotating shaft may be fixedly connected to the upper bar 31, or fixedly connected to the lower bar 33, or may be rotatably connected to both the upper bar 31 and the lower bar 33, which is not limited in the present application; one end of the lower connecting rod 33 is connected with the upper connecting rod 31, the other end is connected with the rotating wheel 21, and the lower connecting rod 33 and the rotating wheel 21 are connected in various modes, for example, the lower connecting rod 33 and the rotating wheel 21 can be connected through a pin shaft, so that the lower connecting rod 33 can transmit power to the rotating wheel 21 and simultaneously maintain the air tightness in the shell 1; for example, the connection can also be hinged connection, so that the connection is convenient for subsequent maintenance and replacement; it is easily understood by those skilled in the art that the connection manner of the lower link 33 and the rotating wheel 21 is not limited to the present application as long as the power can be transmitted by the rotation connection manner.

When the circuit breaker 100 needs to be switched on and off, an operator can transmit power to the main elastic part 32 by operating the operating handle 34, the main elastic part 32 transmits the power to the rotating shaft, the rotating shaft drives the upper connecting rod 31 to move, and the upper connecting rod 31 drives the lower connecting rod 33 to move together, so that the rotating wheel 21 rotates, the movable contact 15 is far away from or close to the static contact 16, and switching between a connection state and a disconnection state of the circuit breaker 100 is realized. Of course, it is easily understood by those skilled in the art that the present application is not limited to the arrangement mode of the operating mechanism 3, the operating mechanism 3 may also be in a transmission mode such as a gear transmission mode, or a three-link or two-link mode, and the present application is not limited to the specific arrangement mode of the operating mechanism 3 as long as the power transmission can be realized.

In some alternative embodiments, when the circuit breaker 100 is in the connection state, the locking mechanism 4 is in the locking state, and the movable contact 15 and the fixed contact 16 are in contact with each other; when the circuit breaker 100 breaks down, the tripping assembly 5 can act on the locking mechanism 4 to switch the locking mechanism 4 from the locked state to the unlocked state, the locking mechanism 4 transmits power to the rotating mechanism 2 through the operating mechanism 3 to separate the moving contact 15 from the fixed contact 16, and then the circuit breaker 100 is disconnected to protect the safety of a circuit.

The arrangement of the locking mechanism 4 is various, and optionally, a four-stage locking mechanism is taken as an example in the embodiment of the present application for description, and it can be understood by those skilled in the art that the locking mechanism 4 may also be a two-stage locking mechanism, a three-stage locking mechanism, a five-stage locking mechanism, etc., and the present application is not limited thereto. The locking mechanism 4 includes a first locking element 41, a second locking element 42, a third locking element 43 and a fourth locking element 44, wherein the first locking element 41 and the second locking element 42 are locked with each other, the second locking element 42 and the third locking element 43 are locked with each other, the third locking element 43 and the fourth locking element 44 are locked with each other, and the four locking elements together form three locking mechanisms, wherein one end of the first locking element 41 is connected with the trip unit 5, when the circuit breaker 100 has abnormal current, the trip unit 5 can act on the first locking element 41, a chain reaction occurs between the locking elements, the fourth locking element 44 is connected with the operating mechanism 3, and after the chain reaction occurs in the locking mechanism 4, the main elastic element 32 is triggered by the fourth locking element 44, the upper connecting rod 31 and the lower connecting rod 33 are driven to move, and finally, the rotating wheel 21 is driven to rotate to separate the movable contact 15 from the stationary contact 16, and the disconnection process of the circuit breaker 100 is completed. Compared with one locking mechanism in the conventional circuit breaker 100, the locking mechanism 4 provided with four stages has a more stable locking effect, and the breaking capacity of the circuit breaker 100 is further improved.

The trip assembly 5 can be arranged in various ways, for example, the trip assembly 5 can be arranged in the form of a moving member and a trip device, a certain gap exists between the moving member and the locking mechanism 4 under the condition that the current is normal, the gap can be adjusted according to the overcurrent multiples of different rated currents to obtain overcurrent trips under different rated currents, and under the condition that the current is abnormal, the trip device can sense the abnormal condition of the current, control the moving member to move and act on the locking mechanism 4, and finally drive the movable contact 15 and the static contact 16 to be separated and disconnected from each other; the tripping assembly 5 can also be controlled in a solenoid valve mode, so that intelligent automation can be realized, and the response is more sensitive. The setting mode of the trip assembly 5 is not limited to this, as long as the locking mechanism 4 can be driven to move to drive the movable contact 15 to be away from the fixed contact 16 when the current in the circuit breaker 100 is abnormal, and the present application is not limited.

In the circuit breaker 100 provided by the embodiment of the application, the circuit breaker 100 includes a housing 1, a rotating mechanism 2, an operating mechanism 3, a locking mechanism 4, a tripping assembly 5 and the like, the locking mechanism 4 and the operating mechanism 3 are both disposed in an accommodating space 14, wherein the accommodating space 14 is outside the housing 1, and the locking mechanism 4 is connected with the operating mechanism 3; the remaining mechanisms are located within the housing 1. When the circuit breaker 100 needs to be tripped and opened due to abnormal current, the tripping assembly 5 drives the locking mechanism 4 to move to unlock, so that the moving contact 15 is separated from the static contact 16 to complete opening. The tripping assembly 5 is arranged in the third part 13 of the shell 1, the locking mechanism 4 is arranged in the accommodating space 14 and is positioned outside the shell 1 and connected with the tripping assembly 5, so that the circuit breaker 100 is arranged without opening the shell 1 to directly contact the tripping assembly 5 with the locking mechanism 4 when the circuit breaker needs to be opened, the air tightness in the shell 1 can be kept, and the arc extinguishing effect and the breaking capacity of the circuit breaker 100 can be improved.

Referring to fig. 4 and 5 in combination, fig. 4 is a schematic perspective view of a housing according to an embodiment of the present disclosure; fig. 5 is an enlarged schematic view of a portion a of fig. 4.

As shown in fig. 4 and 5, in some alternative embodiments, the third portion 13 includes a side wall 131 between the trip unit 5 and the operating mechanism 3, and a through hole 132 penetrating the side wall 131 in the first direction X, and a portion of the trip unit 5 can enter the accommodating space 14 through the through hole 132 and move the locking mechanism 4.

In these alternative embodiments, the through hole 132 is located at the top of the third portion 13 and near one side of the locking mechanism 4, wherein the through hole 132 is located at the same height as the locking mechanism 4, and the through hole 132 is aligned with the locking mechanism 4 along the first direction X, so that when an abnormal current occurs in the circuit breaker 100, a portion hit by the trip assembly 5 can quickly pass through the through hole 132 and hit on the locking mechanism 4, thereby triggering the locking mechanism 4 to perform a chain reaction switching to an unlocking state, and finally transmitting the chain reaction to the rotating mechanism 2 to drive the moving contact 15 and the fixed contact 16 to be separated to complete a switching of an off state of the circuit breaker 100, thereby achieving an effect of quickly opening the circuit breaker 100. When the circuit breaker 100 needs to be switched to the connection state again, an operator can operate the operating handle 34 to drive the locking mechanism 4 to move to switch back to the locking state, and the locking mechanism 4 can contact the tripping assembly 5, so that the locking mechanism 4 can drive the tripping assembly 5 to pass through the through hole 132 again to reset back to the initial state

Referring to fig. 6 in combination, fig. 6 is a schematic structural diagram of a trip assembly according to an embodiment of the present disclosure.

As shown in fig. 6, in some alternative embodiments, the trip assembly 5 includes a driving member 51 and a pushing member 52, and the driving member 51 is used for driving the pushing member 52 to move so that at least a part of the pushing member 52 enters into the accommodating space 14.

In these optional embodiments, the driving member 51 may be disposed in various manners, for example, the driving member 51 may be disposed as a bimetal adjusting nut 511, a bimetal 512 is disposed on the bimetal adjusting nut 511, the bimetal 512 is disposed at intervals, a thermal expansion coefficient of a left side metal piece of the bimetal 512 along the first direction X is greater than a thermal expansion coefficient of a right side metal piece, and the bimetal 512 may also process abnormal conditions under different multiples of rated currents by changing a preset interval distance, when the current is abnormal, the metal piece may be heated and deformed, and since the thermal expansion coefficient of the left side metal piece is greater than the thermal expansion coefficient of the right side metal piece, the bimetal 512 may be deformed in the right direction, so as to push the pushing member 52 to pass through the through hole 132 and strike on the locking mechanism 4, and finally transmit power to the rotating mechanism 2, so as to drive the moving contact 15 to be separated from the static contact 16 to complete the brake breaking process; the driving member 51 may also be an electromagnetic mechanism in the form of a moving iron piece 513 and a static iron piece 514, when the current is abnormal, the electromagnetic mechanism reacts to drive the moving iron piece 513 to impact the pushing member 52, the pushing member 52 passes through the through hole 132 to hit the locking mechanism 4 under the action of the impact force, and finally the power is transmitted to the rotating mechanism 2 to drive the moving contact 15 and the static contact 16 to be separated to complete the process of breaking, and the electromagnetic mechanism is configured to handle the rapid tripping and opening under the condition of large times of abnormal current, such as a short circuit. It is easily understood by those skilled in the art that the driving member 51 of the present application can be arranged by using the aforementioned bimetallic or electromagnetic mechanisms alone or in combination to adapt to different abnormal current conditions, and the specific arrangement of the driving member 51 is not limited.

In the embodiment of the application, the driving element 51, the pushing element 52, the through hole 132 and the locking mechanism 4 are sequentially arranged along the first direction X and located at the same height, wherein the pushing element 52 and the housing 1 are in small-gap fit, so that on one hand, the correctness of the direction of the air flow in the housing 1 and the air tightness between each part in the housing 1 can be ensured, on the other hand, the pushing element 52 and the locking mechanism 4 can be ensured to be in interactive fit under the condition of abnormal current, and the pushing element 52 can quickly penetrate through the through hole 132 to strike the locking mechanism 4, so that the purpose of quickly tripping and separating the brake is achieved.

Referring to fig. 7 in combination, fig. 7 is a schematic view of a structure of a pushing element provided in an embodiment of the present application.

As shown in fig. 7, in some alternative embodiments, the pushing member 52 includes a conductive portion 521 and a pushing portion 522 connected to each other, and the driving member 51 moves the pushing portion 522 through the conductive portion 521.

In these optional embodiments, the conducting portion 521 and the pushing portion 522 are sequentially arranged along the first direction X, the pushing portion 522 protrudes from the conducting portion 521, and one end of the pushing portion 522 close to the through hole 132 is made into a tip, when an abnormal current occurs, the driving member 51 can push the conducting portion 521 to drive the pushing portion 522 to move, the tip passes through the through hole 132 and strikes on the locking mechanism 4 to trigger a chain reaction of the locking mechanism 4, and finally, the moving contact 15 is driven to be separated from the static contact 16, so as to achieve tripping and separating. The conduction part 521 is arranged, on one hand, the power generated during quick striking can be buffered, and the stability of the pushing piece 52 is improved; on the other hand, the air tightness in the shell 1 can be ensured, and the arc extinguishing effect is improved.

In some alternative embodiments, the conducting portion 521 includes a first sub-portion 521a sandwiched between the pushing portion 522 and the driving member 51, and a second sub-portion 521b located on one side of the pushing portion 522 in the second direction Y, and the second sub-portion 521b is slidably connected to the through hole 132; wherein the orthographic projection of the second part 521b on the side wall 131 overlaps the through hole 132.

In these alternative embodiments, the conducting portion 521 may be made into an "L" shape, the first sub-portion 521a extends along the second direction Y, the second sub-portion 521b extends along the first direction X, and the pushing portion 522 protrudes from the first sub-portion 521a toward the through hole 132 along the first direction X and is sandwiched between the first sub-portion 521a and the second sub-portion 521b, so that the entire pushing member 52 can be kept stable, and the pushing member 52 is prevented from being interfered and dislocated during moving and cannot be released. Optionally, in the embodiment of the present application, a slide rail is provided at a position where the side wall 131 and the second subsection 521b move, and the second subsection 521b is slidably connected to the side wall 131, so that on one hand, the friction force between the first subsection 521a and the casing 1 can be reduced, and the smoothness of movement of the pushing member 52 can be increased; on the one hand, the supporting function of the supporting pushing part 522 can be realized; on one hand, the air flow from the lower part can be prevented from being blown back, the pushing piece 52 is prevented from interfering, and the pushing part 522 and the through hole 132 are dislocated or even cannot be separated. It is easily understood by those skilled in the art that the specific arrangement of the conducting portion 521 is not limited thereto, as long as it is ensured that the pushing portion 522 smoothly passes through the through hole 132, and the specific arrangement is not limited in the present application. Wherein, the orthographic projection of the second sub-part 521b on the side wall 131 is overlapped with the through hole 132, so that the cross section of the second sub-part 521b is matched with the shape of the through hole 132, and when tripping and opening are needed, the air tightness in the shell 1 is increased, and the arc extinguishing effect in the circuit breaker 100 is ensured.

In some alternative embodiments, the orthographic projection of the first portion 521a on the sidewall 131 is at least partially outside the through hole 132. In these alternative embodiments, the orthographic projection of the first subsection 521a on the side wall 131 is at least partially located outside the through hole 132, so that when tripping is required, the whole pushing member 52 cannot directly move out of the through hole 132 and fall out of the casing 1, and the pushing member 52 can be clamped on the casing 1, so that the distance for limiting the movement of the pushing member 52 is set, and the pushing member 52 is prevented from falling out of the through hole 132, thereby affecting the tripping effect.

Referring to fig. 8 in combination, fig. 8 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure.

In some optional embodiments, the circuit breaker 100 further includes an arc extinguishing system 6 disposed on a side of the movable contact 15 away from the rotating mechanism 2 along the second direction Y.

In the embodiment of the present application, the arc extinguishing system 6 includes an arc extinguishing chamber 61, the arc extinguishing chamber 61 is located at the bottom of the housing 1, the movable contact 15 is located between the rotating wheel 21 and the arc extinguishing chamber 61, at the moment of opening the circuit breaker 100, because there is a capacitor between the movable contact 15 and the fixed contact 16, insulation breakdown between the contacts and arc generation are caused, the existence of the arc may not only enlarge the fault degree of the circuit system as a whole, but also may damage the contacts themselves, and therefore the circuit breaker 100 needs to provide the arc extinguishing system 6 for reducing the burning loss of the arc to the contacts and limiting the space of arc expansion.

In some alternative embodiments, the arc extinguishing system 6 is located within the first portion 11 and the second portion 12. In these alternative embodiments, the arc-extinguishing chamber 61 is also disposed at the bottom of the first portion 11 and the second portion 12, and is arranged transversely along the first direction X, so that the volume of the entire arc-extinguishing chamber 61 is larger, and more grids can be accommodated, thereby improving the arc-extinguishing effect of the arc-extinguishing system 6 and also improving the reliability of the breaking of the movable contact 15 and the fixed contact 16.

In some optional embodiments, the circuit breaker 100 further includes a gas channel 7 disposed in the second portion 12 and the third portion 13, the trip assembly 5 is in communication with the arc extinguishing system 6 through the gas channel 7, and the gas in the gas channel 7 can drive the trip assembly 5 to move so as to move the moving contact 15 away from the stationary contact 16.

In the embodiment of the present application, the gas channel 7 is led to the top of the housing 1 from the bottom of the housing 1, and the gas rises from bottom to top, compared with the gas left and right movement of the gas channel of the conventional circuit breaker 100, the gas channel 7 of the present application is longer, so that the cooling effect in the gas channel 7 can be enhanced, and the gas can be better cooled, so that the electric arc disappears, and the electric arc cannot enter other components such as the tripping assembly 5 through the gas channel 7 to cause component burnout, thereby affecting the breaking capacity of the circuit breaker 100. Moreover, the gas channel 7 is arranged to form strong gas flow in the gas channel 7 when abnormal current occurs under the condition that the driving element 51 fails due to a fault or is triggered in a delayed manner, so that a high-pressure area is formed in the area of the tripping assembly 5 to generate high-pressure gas, the high-pressure gas can push the first sub-part 521a to enable the push part 522 to penetrate through the through hole 132 and strike on the locking mechanism 4, and finally the movable contact 15 is separated from the static contact 16, so that the purpose of quickly tripping and separating the brake is achieved; in the absence of an abnormal current, no atmospheric air flow is generated in the gas passage 7, so that the pushing member 52 remains stationary and does not hit the lock mechanism 4, thereby not affecting the locked state of the lock mechanism 4. Wherein the moving flow path direction of the gas in the gas channel 7 is shown by the arrow mark in fig. 8.

In some alternative embodiments, in the second direction Y, the outlet of the trip unit 5 and the gas channel 7 is located on the side of the arc extinguishing system 6 facing the rotating mechanism 2. In these alternative embodiments, the outlet of the gas channel 7 is arranged at the top of the housing 1 and on the side facing away from the trip unit 5, so that on the one hand, the gas rises from bottom to top, and the gas has a longer flow path, so that the gas is cooled better and more arcs disappear; on the other hand, in case of failure or delayed triggering of the driving member 51 and abnormal current of the circuit breaker 100, the air flow pushes the first section 521a instead of the second section 521b, and then the locking mechanism 4 is struck to complete the process of tripping and opening.

In some optional embodiments, the circuit breaker 100 further comprises a plurality of deionization units 71, and the plurality of deionization units 71 are spaced apart in the gas passage 7. In these alternative embodiments, the gap of the deionization unit 71 becomes smaller and denser along the gas flowing direction in the gas channel 7, so that the gas in the gas channel 7 can be better cooled, the cooling effect in the gas channel 7 can be enhanced, and zero arcing in the gas channel 7 can be realized. Alternatively, the deionization unit 71 may be a wire-cut integrally formed member, which is convenient to process. It is easily understood by those skilled in the art that the hole type and the mesh type of the deionization apparatus 71 of the present application are not limited as long as the gas in the gas channel 7 can be cooled, and the specific shape and number are not limited.

With continued reference to fig. 8, in some alternative embodiments, the third portion 13 includes a receiving portion 17 communicating with the outside, a terminal 171 is provided in the receiving portion 17, and the outlet of the gas passage 7 communicates with the receiving portion 17. Alternatively, the receiving portion 17 may be provided with through holes on both the top wall and the side wall, through which the wires are connected to the connection terminals 171, and the receiving portion 17 is spaced apart from each portion in the housing 1, so that the wires do not affect the normal operation inside the circuit breaker 100. In these alternative embodiments, the accommodating portion 17 communicating with the outside is provided in the third portion 13, so that on one hand, the gas in the gas channel 7 can flow out of the accommodating portion 17, thereby not affecting the normal operation of each mechanism inside the circuit breaker 100, and increasing the airtightness inside the housing 1; on the other hand, the gas can exit through the outlet of the accommodating portion 17 to push the pushing member 52 to strike the locking mechanism 4 for the purpose of tripping and opening the brake, and the shape and size of the accommodating portion 17 are not limited in the present application.

In some optional embodiments, the circuit breaker 100 further includes a limiting member 45, and the limiting member 45 is disposed on a moving path of the locking mechanism 4 to limit a moving distance of the locking mechanism 4. Optionally, the limiting member 45 is disposed in the moving direction of the first locking member 41 to limit the maximum moving distance of the first locking member 41, so as to prevent the first locking member 41 from tripping and affecting the breaking effect of the circuit breaker 100.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (13)

1. A circuit breaker, comprising:

a housing including a first portion, a second portion, and a third portion sequentially arranged in a first direction, the first portion, the second portion, and the third portion communicating with each other, the second portion having a height in a second direction smaller than the first portion and the third portion so that the first portion, the second portion, and the third portion form a receiving space in half surrounded outside the housing, the first direction intersecting the second direction;

a rotating mechanism rotatably connected in the first part;

the operating mechanism is arranged in the accommodating space, connected to the rotating mechanism and used for driving the moving contact connected with the rotating mechanism to be far away from or close to the static contact;

the locking mechanism is arranged in the accommodating space and drives the movable contact to move through the operating mechanism;

the tripping assembly is arranged in the third part and is configured to drive the locking mechanism to move when the current in the circuit breaker is abnormal so as to drive the moving contact to be far away from the fixed contact.

2. The circuit breaker of claim 1, wherein the third portion includes a sidewall between the trip assembly and the operating mechanism, and a through-hole extending through the sidewall in the first direction, wherein a portion of the trip assembly is capable of entering the receiving space through the through-hole and moving the locking mechanism.

3. The circuit breaker of claim 2, wherein the trip assembly includes an actuator and a push member, the actuator being configured to drive the push member to move to cause at least a portion of the push member to enter the receiving space.

4. The circuit breaker of claim 3, wherein the pushing member comprises a conductive portion and a pushing portion connected to each other, and the driving member moves the pushing portion through the conductive portion.

5. The circuit breaker of claim 4, wherein the conducting portion comprises a first subsection sandwiched between the pushing portion and the actuating member, and a second subsection located at a side of the pushing portion in the second direction, the second subsection being slidably connected to the through hole;

wherein an orthographic projection of the second subsection on the sidewall overlaps the through hole.

6. The circuit breaker of claim 5, wherein an orthographic projection of the first section on the sidewall is at least partially outside the through-hole.

7. The circuit breaker of claim 1, further comprising an arc quenching system disposed along the second direction on a side of the movable contact away from the rotating mechanism.

8. The circuit breaker of claim 7, wherein the arc quenching system is located within the first portion and the second portion.

9. The circuit breaker of claim 7 or 8, further comprising a gas channel disposed in the second portion and the third portion, wherein the trip assembly is in communication with the arc extinguishing system through the gas channel, and the gas in the gas channel can drive the trip assembly to move so as to move the movable contact away from the stationary contact.

10. The circuit breaker of claim 9, wherein in the second direction, the trip assembly and the exit of the gas channel are located on a side of the arc quenching system facing the rotating mechanism.

11. The circuit breaker of claim 10, further comprising a plurality of deionization units spaced apart within the gas channel.

12. The circuit breaker according to claim 9, characterized in that said third portion comprises a housing in communication with the outside, inside which a terminal is arranged, the outlet of said gas channel being in communication with said housing.

13. The circuit breaker of claim 1, further comprising a limit stop disposed on a path of motion of the locking mechanism to limit a distance of movement of the locking mechanism.

Images